What is the main entrance channel of the mould?
The main runner is usually the population channel of the mold.It's next to the injection nozzle.The main runner is usually a tapered channel protruding from the runner, as shown in figure 1-3.The melt flows through the nozzle into the main runner, then into the main runner, from the main runner to any possible shunt, then into the runner runner gate, and from the gate into the mold cavity.